<template>
  <div class="home-container">
    <!-- 搜索导航栏 -->
    <van-nav-bar class="page-nav-bar" fixed>
      <van-button
        class="search-btn"
        slot="title"
        type="info"
        size="small"
        round
        icon="search"
        @click="$router.push('/search')"
        >搜索</van-button
      >
    </van-nav-bar>
    <!-- 频道列表 -->
    <van-tabs v-model="active" animated swipeable class="channel-tabs">
      <van-tab :title="item.name" v-for="item in channels" :key="item.id"
        ><article-list :item="item"> </article-list
      ></van-tab>
      <div slot="nav-right" class="placeholder"></div>
      <div slot="nav-right" class="hamburger-btn">
        <i class="toutiao toutiao-gengduo" @click="isChannelEditShow = true"></i>
      </div>
    </van-tabs>
    <!-- 频道编辑区域 -->
    <van-popup
      v-model="isChannelEditShow"
      close-icon-position="top-left"
      closeable
      position="bottom"
      :style="{ height: '100%' }"
    >
      <channel-edit :myChannels="channels" :active="active" @update-active="onUpdateActive"/>
    </van-popup>
  </div>
</template>

<script>
import { getUserChannels } from '@/api/user.js'
import ArticleList from './components/article-list'
import ChannelEdit from './components/channel-edit'
import { mapState } from 'vuex'
import { getItem } from '@/utils/storage.js'
export default {
  name: 'HomePage',
  components: {
    ArticleList,
    ChannelEdit
  },
  props: {},
  data () {
    return {
      active: 0,
      channels: [],
      isChannelEditShow: false
    }
  },
  computed: {
    ...mapState(['user'])
  },
  watch: {},
  created () {
    this.loadChannels()
  },
  mounted () {},
  methods: {
    async loadChannels () {
      try {
        let channels = []
        if (this.user) {
          const { data } = await getUserChannels()
          channels = data.data.channels
        } else {
          // 未登录
          const localChannels = getItem('TOUTIAO_CHANNELS')
          if (localChannels) {
          // 有本地频道数据，则使用
            channels = localChannels
          } else {
            const { data } = await getUserChannels()
            channels = data.data.channels
          }
        }
        // 将数据更新到组件中
        this.channels = channels
      } catch (error) {
        this.$toast('获取频道列表数据失败')
      }
    },
    onUpdateActive (index, isChannelEditShow) {
      this.active = index
      this.isChannelEditShow = isChannelEditShow
    }
  }
}
</script>

<style scoped lang="less">
.home-container {
  padding-top: 115px;
  padding-bottom: 100px;
  /deep/.van-nav-bar__title {
    max-width: unset;
  }
  .search-btn {
    width: 555px;
    height: 64px;
    background-color: #5babfb;
    border: none;
    font-size: 28px;
    .van-icon {
      font-size: 32px;
    }
  }
}
/deep/ .channel-tabs {
  .van-tabs__wrap.van-tabs__wrap--scrollable {
    position: fixed;
    top: 92px;
    z-index: 2;
    width: 100%;
  }
  .van-tab {
    border-right: 1px solid #edeff3;
    min-width: 200px;
    height: 80px;
    .van-tab__text {
      font-size: 27px;
      color: #777777;
    }
  }

  .van-tab--active .van-tab__text {
    color: #333 !important;
  }
  .van-tabs__line {
    width: 31px !important;
    height: 6px;
    background: rgba(50, 150, 250, 1);
    border-radius: 3px;
    bottom: 8px;
  }
  .van-tabs__nav {
    padding: 0;
  }
  .placeholder {
    flex-shrink: 0;
    width: 66px;
    height: 82px;
  }

  .hamburger-btn {
    position: fixed;
    right: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 66px;
    height: 82px;
    background-color: #fff;
    opacity: 0.902;
    i.toutiao {
      font-size: 33px;
    }
    &:before {
      content: "";
      position: absolute;
      left: 0;
      width: 1px;
      height: 100%;
      background-image: url(~@/assets/gradient-gray-line.png);
      background-size: contain;
    }
  }
}
</style>
